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[–]Alienhunter 2 insightful - 2 fun2 insightful - 1 fun3 insightful - 2 fun -  (0 children)

The ancient Greeks weren't aware of Pluto. It's too small and far away to be seen except with very modern telescopes.

I'm against the whole demoting of Pluto as a planet because the definition is kinda bullshit. But the truth of the matter is that there's more than "9" planets in our solar system. So long as we count a planet as any body large enough to be spherical.